import ast

from billard.serializers import LocationDataSerializer
from billard.models import LocationData, Location, Client, Accounting
from billard.tasks import process_location_data
from rest_framework import viewsets
from django.shortcuts import render, redirect
from django.views import generic
from django.views.generic.detail import DetailView
from django.contrib.auth.decorators import login_required, permission_required
from django.db.models import Min, Sum
from django.http import HttpResponse
from django.utils.decorators import method_decorator


class LocationIndexView(generic.ListView):
    template_name = 'billard/location_index.html'
    context_object_name = 'location_list'

    def get_queryset(self):
        """Return the last five published questions."""
        return Location.objects.filter(users__id=self.request.user.id).order_by('code')


class LocationDetailView(generic.DetailView):
    model = Location
    template_name = 'billard/location_detail.html'

    def dispatch(self, request, *args, **kwargs):
        if request.is_ajax():
            context = {
                'location': self.get_object(),
            }
            return render(request, template_name='billard/location_detail_ajax.html', context=context)
        return super(LocationDetailView, self).dispatch(request, *args, **kwargs)


@method_decorator(login_required, name='dispatch')
class AccountingView(generic.ListView):
    template_name = 'billard/accounting.html'
    context_object_name = 'accounting'

    def get_queryset(self):
        return Accounting.objects.filter(billed=False).exclude(time_to__isnull=True).order_by('time_from')

    def dispatch(self, request, *args, **kwargs):
        result = super(AccountingView, self).dispatch(request, *args, **kwargs)
        acc_sum = self.get_queryset().aggregate(Sum('prize'))
        if acc_sum['prize__sum'] is None:
            result.context_data['acc_sum'] = 0
        else:
            result.context_data['acc_sum'] = acc_sum['prize__sum']
        result.context_data['acc_ids'] = [acc.id for acc in self.get_queryset().all()]
        return result


@login_required
@permission_required('billard.change_accounting')
def accounting_confirm(request, pk):
    if request.method == 'POST':
        if 'accountings' in request.POST:
            acc_ids = ast.literal_eval(request.POST['accountings'])
            if len(acc_ids) > 0:
                Accounting.objects.filter(id__in=acc_ids).update(billed=True)
                Accounting.objects.filter(id__in=acc_ids).update(account_user=request.user.username)
    resp = redirect('billard:accounting_detail', pk=pk)
    return resp


@login_required
def account_modal_view(request):
    try:
        uuids = Client.objects.filter(report_user=request.user).values_list('uuid')
        account = Accounting.objects.filter(reporter_uuid__in=uuids).first
        # TODO: support multiple account objects
    except Client.DoesNotExist:
        account = None
    context = {
        'account': account
    }
    return render(request, 'billard/accountmodal.html', context=context)


@login_required
def account_modal_confirm_view(request, pk):
    account = Accounting.objects.get(pk=pk)
    account.reporter_uuid = None
    account.save()
    return redirect('billard:location_detail', pk=account.desk.client.location_id)


class LocationDataViewSet(viewsets.ModelViewSet):
    queryset = LocationData.objects.all()
    serializer_class = LocationDataSerializer


def process_location_data(request):
    process_location_data()
    return HttpResponse('DONE')